律戒本疏 1.113

1.113

六十減半月洛犯墮　洴沙王有三渠水　與眾僧共用上渠。比丘數浴防廢王用。是以結戒。以半月為限。限後天熱不浴致病。開熱時。隨意而浴。春殘一月半。夏初一月。又病時穢污。風時坌塵。雨時衣計。行作垢污。聽浴無犯。浴時應著衣。胡跪合掌。向一比丘言。長老憶念。我如是因緣須浴。若師在皆應白師。若無師應白上坐。若無上坐應語下坐。但不胡跪耳。一切所應作皆如是。若五十臘出界及大事應白應語。小事不須白語。是故說。

Sixty: Bathing at intervals of less than half a month is an offense of pāyattika. King Bimbisāra had three canals of water and shared the upper canal with the Saṃgha. The monks bathed frequently, interfering with and hindering the king's use; therefore the precept was instituted, setting the limit at half a month. After the limit was set, during hot weather they did not bathe and fell ill; so an exception was opened for hot weather, allowing them to bathe at will: the remaining one and a half months of spring and the first month of summer. Furthermore, when ill and defiled, when dusty during wind, when robes are soaked during rain, or when traveling and working cause dirt and sweat, bathing is permitted and there is no offense. When bathing, one should wear clothing, kneel with the right knee on the ground, join palms, and say to one monk: 'Venerable, please remember: for such-and-such reasons I need to bathe.' If one's teacher is present, one should report to the teacher in all cases; if there is no teacher, one should report to a senior monk; if there is no senior monk, one should inform a junior monk, only without kneeling on the ground. Everything that ought to be done is like this. If one has fifty vassa, leaving the boundary and matters of great importance should be reported and informed; matters of little importance need not be reported or informed. Therefore it is said.